#include <sys/time.h>
#include <errno.h>
#include "syscall.h"

#define IS32BIT(x) !((x)+0x80000000ULL>>32)

int setitimer(int which, const struct itimerval *restrict new, struct itimerval *restrict old)
{
    if (sizeof(time_t) > sizeof(long)) {
        time_t is = new->it_interval.tv_sec, vs = new->it_value.tv_sec;
        long ius = new->it_interval.tv_usec, vus = new->it_value.tv_usec;
        if (!IS32BIT(is) || !IS32BIT(vs))
            return __syscall_ret(-ENOTSUP);
        long old32[4];
        int r = __syscall(SYS_setitimer, which,
            ((long[]){is, ius, vs, vus}), old32);
        if (!r && old) {
            old->it_interval.tv_sec = old32[0];
            old->it_interval.tv_usec = old32[1];
            old->it_value.tv_sec = old32[2];
            old->it_value.tv_usec = old32[3];
        }
        return __syscall_ret(r);
    }
    return syscall(SYS_setitimer, which, new, old);
}
